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Ursa Astronomical Association

Half-sky auroras - 27.8.2022 at 23.49 - 28.8.2022 at 02.20 Utsjoki, Karigasniemi Observation number 108866

Visibility IV / V

I thought the darkness was just enough and the values were so good and the sky was almost cloudless. I was thinking of going somewhere to the lower slope of the fell, but the fires were already on the road, so I stayed on the road to photograph and watch. The north direction was too bright!! In other directions, the darkness was enough, as was the humidity...the lens had to be cleaned all the time. I was still trying to focus on what I saw above my head, some conker said that coronas appear there. I also saw red ones, but in my opinion the best thing went sideways, a car passed by at the same moment and I had to go to the side.

It was a great night.

More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Observed aurora forms
    • Arc info

      ARC The arcs are wider than the bands and do not fold as strongly. The arcs are normally neither very bright nor active.

      The arc is probably the most common form of aurora. When aurora show is a calm arc in the low northern sky it often doesn’t evolve to anything more during night. In more active shows the arc is often the first form to appear and the last to disappear.

      The lower edge of the arc is usually sharp but the upper edge can gradually blend into the background sky. As activity increases rays and folds normally develop, and the arcs turn gradually into bands.

      An aurora arc runs across the picture. Vertical shapes are rays. Photo by Atacan Ergin.

      Aurora Arc. Photo by Mauri Korpi.

      Aurora Arc. Photo by Anna-Liisa Sarajärvi.

      Aurora Arc. Photo by Matti Asumalahti.

    • Corona info

      CoronaA corona is a hand fan shaped structure, it usually forms south of the observer's zenith, most commonly consisting of rays or bands. The corona is usually the most beautiful part of the aurora show. It is bright and active, but on the other hand also short-lived.

      Aurora corona. Photo by Anna-Liisa Sarajärvi.

      Aurora corona. Photo by Merja Ruotsalainen.

      Corona formed from bands. Photo by Markku Ruonala.

      Aurora corona. Photo by Tapio Koski.

    • Band info

      Bands are usually narrower, more twisty at the bottom, brighter, and more active than arches. Bands usually develop from arches.

      Bands can form J and U shapes, sometimes even full spirals. The corona can also arise from bands. Bands are a fairly common form of aurora.

      Aurora band. Photo by Merja Ruotsalainen.

      Aurora band. Photo by Matias Takala.

      Aurora band. Photo by Lea Rahtu-Korpela.

      Aurora bands. Photo by Lauri Koivuluoma.

      Aurora band. Photo by Matias Takala.

    • Rays info

      The raysare parallel to the lines of force of the magnetic field, i.e. quite vertical, usually less than one degree thick light streaks. The rays can occur alone or in connection with other shapes, mainly with arcs and bands. Short rays are usually brightest at the bottom but dim quickly. The longest rays, even extending almost from the horizon to the zenith, are usually uniformly bright and quite calm, and unlike the shorter rays, most often occur in groups of a few rays or alone. Rays, like bands, are a very typical form of aurora.

      Artificial light pillars, which are a halo phenomenon visible in ice mist, can sometimes be very similar to the rays of aurora. Confusion is possible especially when the lamps that cause the artificial light pillars are far away and not visible behind buildings or the forest. The nature of the phenomenon is clear at least from the photographs.

      Rays. Picture of Tom Eklund.

      Rays. Photo by Mika Puurula.

      Two beams rise from the aurora veil. Photo by Anssi Mäntylä.

      Two radial bands. Show Jani Lauanne.

      Radial band and veil. Photo by Jussi Alanenpää.

      Two rays. Photo by Aki Taavitsainen.

      It may be possible to confuse such rays with artificial light columns. Compare the image below. Picture of Tom Eklund.

      There is no aurora in this image, but all the light poles - including the wide and diffuse bar seen at the top left - are artificial light pillars born of ice mist. Photo by Sami Jumppanen.

      Aurora and artificial light pillars. All the radial shapes in the picture above are probably artificial light pillars that coincide appropriately with the aurora band. In the image below, the aurora band has shifted and does not overlap with the pillars produced by the orange bulbs. There is no orange in auroras. Photo by Katariina Roiha

  • Colors with unaided eye and other features
    • Green auroras info

      Green, seen with the naked eye, is one the most common colors of the aurora. The green color is derived from atomic oxygen.

      Green auroras. Lea Rahtu-Korpela.

      Green auroras. Photo by Juha Ojanperä.

    • Blue auroras info

      Clearly blue auroras can be seen only during the best aurora displays close to the maximum phase or soon after it. Sometimes blue auroras can be seen shortly after the sunset at the top part of the auroral shapes, specially rays. It is created by the mission of the ionized nitrogen molecules created by the suns radiation.

      Strongly colored blue auroras. Photo by Jorma Mäntylä.

      Blue top parts of the aurora. Image by Tom Eklund. 

      Blue top parts of the aurora. Image by Jaakko Hatanpää.

      Partly blue corona. Photo by Tapio Koski.

      Faintly blue top parts of an aurora veil. Photo by Jaakko Hatanpää.

Comments: 3 pcs
Tero Sipinen - 28.8.2022 at 14.56 Report this

Sen verran on ollut kirkkautta loimuissa, että hyvin riitti pimeys! Komeata!

Lisäsin ylläpidollisesti koronan tunnisteisiin. Koronahan ei ole sinänsä oma revontulimuotonsa, vaan silloin kun revontulivyö nousee zeniittiin, perspektiivivaikutelma vuoksi revontulivyön rakenteet ("verhon poimut") näyttävät säteilevän zeniitistä muodostaen taivaanlelle revontulikruunun, -koronan.

Tarja Kouvo - 28.8.2022 at 15.03 Report this

Hei kiitos Tero! Itsekin arvelin nähneeni sen "koronan", en vaan ollut varma. Kiitos kuuluu kanssa sille konkarille, joka neuvoi tuijottamaan ylöspäin. Niskat nurin sitten tilanteen mukaan tuijottelin sitä zeniittiä. Tuo oli elämäni ensimmäinen zeniittikruunu!

Tero Sipinen - 28.8.2022 at 15.16 Report this

Kas, "oppia ikä kaikki" itsellenikin: ihmettelin ensin koronan infotekstissä mainittua magneettista zeniittiä mutta niinhän se tosiaan on, että koronan "keskipiste" (se, mistä muodot näyttävät säteilevän ulospäin) ei olekaan ihan zeniitissä, vaan vähän sen eteläpuolella, magneettisessa zeniitissä. Mutta jos sanotaan että "suoraan yläpuolella" niin se on koronaa bongaavalle riittävän tarkka suuntamääritelmä :) 

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